Chapter 1: Hydrology and Hydrologic Cycle

Question 1

science, which deals with the occurrence, distribution and disposal of water on the planet earth; it is the science which deals with the various phases of the hydrologic cycle.

Keywords : natural processes

Answer 1

Hydrology

Question 2

branch of engineering that applies fluid mechanics principles to problems dealing with the collection, storage, control, transport, regulation, measurement, and use of water.

Keywords : man-made processes

Answer 2

Hydraulics

Question 3

Give 10 Hydrologic Data

Answer 3

1. Climatological data
2. Hydrometeorological data
3. Precipitation records
4. Stream-flow records
5. Seasonal fluctuation
6. Evaporation data
7. Cropping pattern
8. Water quality
9. Geomorphologic studies of basin
10. Hydrometeorological characteristics of basin

Question 4

____________________ is the water transfer cycle, which occurs continuously in nature.

Answer 4

Hydrologic cycle

Question 5

Give the 7 important phases of Hydrologic cycle

Answer 5

1. Evaporation
2. Evapo-transpiration or Transpiration
3. Condensation
4. Precipitation
5. Runoff
6. Infiltration
7. Groundwater Flow

Question 6

For every stream, a well-defined area of land intercepts the rainfall and transports it to the stream. The area of land is called the ______________, ____________, or _______________. These three terms generally are used interchangeably.

Answer 6

catchment area, watershed, or drainage basin

Question 7

Watershed/Drainage Basin

_________: bent contour lines that point uphill

Answer 7

Swale

Question 8

Watershed/Drainage Basin

_________: bent contour lines that point downhill

Answer 8

Ridge

Question 9

Watershed/Drainage Basin

_________: transition between two ridges and two swales.

Answer 9

Saddle

Question 10

What are the steps in watershed delineation?

Answer 10

1. Identify highest points.
2. Draw divide perpendicular to contour lines along ridge and saddle but not across swale.
3. Find the lowest point, can be a river.

Question 11

Philippine Watersheds

The ____________ Reservoir releases 10 times more water than it receives from its own catchment area.

Water from Angat Dam ay dinadala muna rito kasi ‘di pa madi-distribute yun agad sa mga tao.

Answer 11

La Mesa

Question 12

Philippine Watersheds

The ________________ is the last rainforest in NCR.

This is the only watershed in Metro Manila.

Answer 12

La Mesa Watershed

Question 13

Philippine Watersheds

________________ is part of the Pasig-Marikina-Laguna de Bay basin, connecting the basin to Manila bay through Pasig River.

Answer 13

Manila Subbasin

Question 14

Philippine Watersheds

Pasig River changes flow direction depending on the time of the year.

____ Season: To Manila bay

____ Season: To Laguna de bay

Answer 14

Wet, Dry

Question 15

Philippine Watersheds

_______________ is the only stream through which Laguna de Bay drains to Manila Bay.

It is the only water/drainage outlet of Laguna de bay.

Answer 15

Pasig River

Question 16

Philippine Watersheds

Pasig River is situated at the downstream end of ________________, which has the largest drainage area in the whole Pasig-Marikina-Laguna de Bay basin.

Answer 16

Marikina River

Question 17

Philippine Watersheds

The Pasig-Marikina-Laguna Basin is composed mostly of provinces of __________, ___________, and ______________.

Answer 17

Laguna, Rizal, and Metro Manila

Question 18

Philippine Watersheds

To mitigate flooding downstream, which includes a portion of the highly urbanized Metro Manila, flood waters are diverted to _________________.

Answer 18

Laguna de Bay

Question 19

Philippine Watersheds

The ___________________ has the longest coastline along Manila Bay. Along its coast is also a unique feature called the Cavite Spit.

Answer 19

Cavite River Basin